A5085341356- Aluminum Alloys Composites Properties
- Advanced Welding Techniques Analysis
- Additive Manufacturing and 3D Printing Technologies
- Additive Manufacturing Materials and Processes
- MXene and MAX Phase Materials
- Aluminum Alloy Microstructure Properties
- Magnesium Alloys: Properties and Applications
- High-Temperature Coating Behaviors
- Legal Issues in South Africa
- Metal and Thin Film Mechanics
- Cold Atom Physics and Bose-Einstein Condensates
- Graphene research and applications
- Rheology and Fluid Dynamics Studies
- High Entropy Alloys Studies
- Gyrotron and Vacuum Electronics Research
- Metal Forming Simulation Techniques
- Block Copolymer Self-Assembly
- Fluid Dynamics and Thin Films
- Metal Alloys Wear and Properties
- Quantum, superfluid, helium dynamics
- High Temperature Alloys and Creep
- Advanced Materials Characterization Techniques
- Manufacturing Process and Optimization
- Microstructure and mechanical properties
Baylor University
2022-2024
Wichita State University
2024
University of Alabama
2019-2023
Geological Survey of Alabama
2023
U.S. Army Engineer Research and Development Center
2023
University of Virginia
1993
In this work, the effect of processing parameters on resulting microstructure and mechanical properties magnesium alloy WE43 processed via Additive Friction Stir Deposition (AFSD), a nascent solid-state additive manufacturing (AM) process, is investigated. particular, parameterization study was carried out, using multiple four-layer deposits, to identify suitable process window for structural 68-layers bulk deposition. The parametric identified an acceptable set with minimal surface defects...
In this study, the as-deposited microstructure and mechanical properties are examined for both wrought strain hardened Al-Mg-Mn alloy (AA5083-H131) feedstock AA5083 machine chip waste processed with Additive Friction Stir Deposition (AFSD). Monotonic tensile uniaxial fatigue experiments compared three specimen types: AA5083-H131 Wrought control, AFSD-Recycled, AFSD-Solid bar. Tensile results demonstrated comparable performance between recycled material control. Experimental indicate...
Large-scale metal additive manufacturing (AM) provides a unique solution to rapidly develop prototype components with net-shape or near-net shape geometries. Specifically, friction stir deposition (AFSD) is solid-state method for large-scale AM that produces depositions capable of high rates. As AFSD utilized broader range applications, there need understand strategies larger and more complex In particular, surface areas will require overlapping passes within single layer. this study, the...
Abstract In recent years, additive manufacturing (AM) has gained prominence in rapid prototyping and production of structural components with complex geometries. Magnesium alloys, which have a strength-to-weight ratio that is superior compared steel aluminum shown potential lightweighting applications. However, commercial beam-based AM technologies limited success magnesium alloys due to vaporization hot cracking. Therefore, as an alternative approach, we propose the use near net-shape...
Additive Friction Stir Deposition (AFSD) is a recent innovation in non-beam-based metal additive manufacturing that achieves layer-by-layer deposition while avoiding the solid-to-liquid phase transformation. AFSD presents numerous benefits over other forms of fusion-based manufacturing, such as high-strength mechanical bonding, joining dissimilar alloys, and high rates. To improve, automate, ensure quality, uniformity, consistency process, it necessary to control temperature at interaction...
Abstract In this work, Additive Friction Stir Deposition (AFSD) was employed for ballistic repair of AA7075-T6511 plates. After penetration with 7.62 × 51 mm FMJ rounds, the plates were repaired by AFSD using same feedstock material. The impacted and penetrated surface damage characteristics including initial residual velocities compared against control wrought process successfully damaged alloy, without any observable defects such as large cracks or pores prior to impact tests. Although...
High-entropy alloys (HEAs) are new alloy systems that leverage solid solution strengthening to develop high-strength structural materials. However, HEAs typically cast alloys, which may suffer from large as-cast grains and entrapped porosity, allowing for opportunities further refine the microstructure in a non-melting near-net shape solid-state additive manufacturing process, friction stir deposition (AFSD). The present research compares mechanical behavior of as-deposited AFSD...
In this research, we explore the preliminary effects of processing conditions using a novel additive manufacturing (AM) process, known as friction stir deposition (AFSD), on resulting build direction (BD) mechanical performance. Using AFSD feasibility study three AM builds identical size are created differentiating parameters. A relationship referred to pitch, exhibiting similarities weld is determined be simple but effective predictor interlayer bonding in AA7020. The pitch directly...
In this work the applicability and challenges of low-power direct additive recycling (DAR) for on-site manufacturing repair is discussed. Specifically, research addresses current DAR efforts on representative lunar regolith simulants combined with aluminum alloy (AA6061) feedstock to fabricate fully dense structural components. Optical microscopy scanning electron identified a deposition particles refined dispersed throughout matrix. Microhardness maps captured uniform hardness gradient...
Abstract A smooth particle hydrodynamic (SPH) simulation of an additive friction stir deposition (AFSD) repair was used to inform a multi-physics approach predict the fatigue life high strength aluminum alloy. The AFSD process is solid-state layer-by-layer manufacturing in which hollow tool containing feedstock deposit material. While understanding evolving microstructures necessary material performance, elevated temperatures and strain rates associated with severe plastic deformation...
Additive friction stir deposition (AFSD) is a solid-state additive manufacturing process that exploits frictional heat generation and severe plastic deformation to deposit material achieve metallurgical bonding while avoiding liquid-to-solid phase transformations. The AFSD enables layer-by-layer depositions without many of the issues associated with fusion-based processing traditional wrought alloys, such as porosity, hot cracking, high residual stress. Unfortunately, conditions are highly...
Abstract This article reports on the development of additive friction stir deposition techniques that use secondary feedstocks such as machine chips and damaged components to make in-field repairs at point need. The focus initial research was aluminum alloys. Preliminary studies show significant promise for adaptation these hard alloys including steel castings, wrought high strength steels, titanium
<div class="section abstract"> class="htmlview paragraph">There is a critical military need to improve readiness and operational performance by utilizing Additive Manufacturing (AM) for the sustainment modernization of ground vehicles. AM opens opportunity add value manufacturing parts components that may be limited or not achievable traditional methods materials. Additionally, can serve as secondary source solve supply-chain obsolescence issues at point repair. One primary...